NUMERICAL MODELING ON SUSPENDED SEDIMENT TRANSPORTATION IN THE HANGZHOU BAY

In this paper the characteristics of tidal flow and seasonal variation of seidment content in the Hangzhou Bay and their affecting factors a re studied. Field investigations and data analysis indicate that the s ediment movement is mainly influenced by the Yangtze estuary and the s ediment of the Yangtze estuary is induced by wind wave and tidal flow. Owing to the variation of dynamic conditions, the instantaneous sedim ent content is controlled by tidal flow, wind wave, depth of water and tidal range synthetically. A sediment content relationship formula is established with related factors. A non-equilibrium 2-dimensional num erical model of suspended sediment transportation is set up, and the f inite element method is applied. The computation results of the model is in accordance with field data.